explain this code

Question

#sum of consecutive number

N = int(input())

sum = int(N*(N+1)/2)
print (sum)

Answer 1

That looks very simple, can you share what you think it means?

Answer 2

sum is a bit misleading name for the result of n*(n+1)/2.
result would make more sense.

Answer 3

Apollo-Roboto it's the formula for the sum of all numbers from 1 to N.

Answer 4

Sd Amar it is a brilliant technique invented by Gauss as a youngster (age 10). The reasoning behind it is a little sophisticated. I explain it in the comments of the code posted here:

https://code.sololearn.com/cxQki21ZMDIX/?ref=app